Synonyms & Trade Names Calcium hydrate, Caustic lime, Hydrated lime, Slaked lime Exposure Limits NIOSH REL TWA 5 mg/m3 OSHA PELTWA 15 mg/m3 (total) 5 mg/m3 (resp) Physical Description White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.] Melting Point 1076°F (Decomposes) (Loses H2O) Incompatibilities & Reactivities Maleic anhydride, phosphorus, nitroethane, nitromethane, nitroparaffins, nitropropane [Note: Attacks some metals.] Exposure Routes inhalation, ingestion, skin and/or eye contact Symptoms irritation eyes, skin, upper respiratory system; eye, skin burns; skin vesiculation; cough, bronchitis, pneumonitis Target Organs Eyes, skin, respiratory system Personal Protection/Sanitation (See protection codes) First Aid (See procedures) Respirator Recommendations |